279356641 has 2 divisors, whose sum is σ = 279356642. Its totient is φ = 279356640.

The previous prime is 279356633. The next prime is 279356653. The reversal of 279356641 is 146653972.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 278723025 + 633616 = 16695^2 + 796^2 .

It is a cyclic number.

It is not a de Polignac number, because 279356641 - 2³ = 279356633 is a prime.

It is not a weakly prime, because it can be changed into another prime (279356621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139678320 + 139678321.

It is an arithmetic number, because the mean of its divisors is an integer number (139678321).

Almost surely, 2^279356641 is an apocalyptic number.

It is an amenable number.

279356641 is a deficient number, since it is larger than the sum of its proper divisors (1).

279356641 is an equidigital number, since it uses as much as digits as its factorization.

279356641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 43.

The square root of 279356641 is about 16713.9654480916. The cubic root of 279356641 is about 653.7118135063.

The spelling of 279356641 in words is "two hundred seventy-nine million, three hundred fifty-six thousand, six hundred forty-one".